Chaules thomas mason



C. T. MASON.

IGNITION DYNMM). Arrucmon min an. n. ma.

1,325,257; mm 1m 16,1919.

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I w n 3 i I ma l w g a i fizvcrztan C. T. MASON.

IGNITION DYNAMO.

APPLICATION mm ma. 1:. ma.

Patented 1m 16,1919.

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; cnmns mouse mson, or summer, soo'm omen, asszonon-ro srnn'nonr NEWQK, new mnsnr, a concession or NEW To all whom it may concern:

UNITED seams-,-

PATENT OFFICE.

ELEGTBIOAL COMPANY, mean.

mm mon-mmmo.

fln e or new raw. Pateated Dec. 16, 1919.

Application magma 15, me. Berle! Ho. ass-:9.

Be it known that 1, CHARLES Tnou es MASON, a citizen of the United States, resuling at Sumter, in the county of Sumter and State of South Carolina,.have invented eertein new and useful Im rovements in Ignition-D namos, of which the following is a speeei cation, reference being lmd to the accompanying drawing. This'invention relates to ignition dynamos commonly termed magnetos, and has for its object the production of a. simple, cheap andeflicient machine, easily constructed, of few parts, and adapted for either high or low tension work.

A further object is to eliminate all moving wire, and to make the movin parts very light, so they have comparatively little inertia thereby making this machine )nrticularly desirable as an oscillator. Tiere are, other objects that will hereinafter more fully appear.

In the accompanying drawings, Figure 1 is a front. elevation of the driving end of the machine, Fig. 2, a side "iew of the same, Fig. 3 an end view'partly in section, and

Figs. 4, 5, and 6, views showing the path of the magnetic tlux'through the mac zine when the operating parts thereof are in different positions.

Like figures of reference denote the same parts wherever the are shown.

1, denotes a. suite le permanent magnet or .magnets attached in any suitable manner,

such as by the screws, 2 and 2, to the pole pieces 3 and 3", the latter being attached to a suitable non-magnetie base '4. Carriedupon and secured to this base is the stationary core 5, carrying a smtable'wuuhng 6, one end of which may be connected to the core 5 and the other and brought out of the machine in any suitable manner.

Carried upon the core 5 and pivotally connected thereto (or pivoted topole pieces 3, and 3) arethe flaps 7, 8, 9, and 10, of magnetic material, normally held in their closed positions shown in- F g. 3 by suitable,

These flaps norsprings 11, 12, 13 and 14. inally serve to bridge the .air gaps between the pole shoes 3 and 3" and the poles of the core 5, the flaps extending the. complete length of the pole- .shoes from one end of the magneto to the other.

- po e new 3" and to the The ends of the flaps or the shafts'carrying the same project outwardly from the drlvin end 0 the magneto, and are ar range as shown outer end suitable cams or 'ro'llers indicated at 15, 16, 17 and 18. These rollers are en- ,gaged by the cams .19 and carried on a suitable shaft 21, plate'22.

The cams-19 and 20 sitioned in relation to that they operate the journaled in the end are so shaped and pothe rollers on the flaps same in pairs as hereinafter described, thereby causin a change in the direction of theflow o the flux through the core 5. It is obvious however that more than two cams may be used, and these may be so shaped as to openthe flaps any desired number of times per revolution, or in any desired sequence.

From the foregoing description will be obvious that the ,winding in this magneto is stationary; that the movin parts consist of the shaft 21, carrying t is two light cams 19 and 20; that these cams engage the light rollers and flaps, and that the entire operating mechanism is very light. and therefore easy to drive.

It is obvious that oscillated and I consider this machine parthe shaft may be in Fig. 2 and carry at their ticularly well adapted for use as an oscillating magneto.

Fig.--l' shows the magneto with the flaps in the non-operative position, whereby they bridge the an gaps between the pole pieces 3 and 3" and the core 5, the flux then passes from the. N to the S pole of the magnet as shown by the arrows, without passing through the core 5 of the sequently no current is generate .-\t Fig. 5, one pair of flaps 7 and 10 have been opened. thereby breaking one path for the flux, which must now flow fromthe N pole of the magnet to pole piece 3, across Ha 1 9, through the core 5, through flap 8 to S 'pole of the magnet, there y subjecting the winding 6 to a magnetic influence.

The. shaft being now further revolved,

' core 5, to flap 10, to pole the S pole of the magnet.

versal of the flux through the core 5, gening all air gaps therein,

piece 3" and to This sudden reture and the ad'acent pole pieces; or the armature and po e pieces were both stationary, and a movable member acted between them. .Here also air gaps would exist, and as air gaps greatly cut down the eliiciency of a machine of this type, their elimination in m invention is a feature of importance. I ma e the hinge between the flaps and the core 5 of the armature as good mechanically as it is ossible to make it, so as to provide as o a path as possible for the flux. A l rther path is provided by the springs 11, 12, 13 and 14.

It wiil be apparent-to those skilled in the art that accurate fitting in a machine of this description is reduced to a minimum; that the greatest accuracy required is in connection with the cams 19 and 20, so they will cause the oppositely disposed flaps, 7 and 10, and 8 and 9 to close and open relatively at the right time and in unison.

I have shown and described a so called low tension magneto. It is readily seen that a high tension machine can be made by the addition of a circuit breaker, condenser and secondary winding; and as such additional parts and their arrangement are aeadily understood I do not describe them ere.

And while I have shown the preferred embodiment of my invention, it will be undcrstood that I do not limit myself to the precise form herein described as many modications may be made without departing from the invention I claim herein.

I claim:

1. An ignition dynamo comprising a stationary core body and poles thereon and a winding on the body portion, a magnet having poles spaced a art from said core poles, flux controlling aps adapted to simultaneously bridge the gaps between all of said poles, and means for actuating said flaps so that the m etic flux-is directed alternately in a divide path through all the flaps and the core ends and a single path through two flaps and the core body.

2. An ignition dynamo comprising a. stationary oorc having poles and a windin therebetween, a magnet having poles spaced apart from said core poles, flux conducting flaps adapted to simultaneously bridge the for actuatin said. flaps so that the ma ,netic flux is irected first in a divided pat through all the flaps and the core ends and then 111 a single path through two flaps and the core body.

. 3. An ignition dynamo compris' a stationary core having a winding an poles, a magnet having poles spaced apart from said core poles separate movable flux conducting hrn ed fla adapted to .simultaneously bri ge eac core pole to the opposite ad acent magnet poles and to maintam extended contact therewith, and means for actuating said flaps whereby the flux through the core may be alternately reversed in direction. 4. An ignition dynamo comprising a stationary core having a nerating winding thereon and poles attac' ed thereto, a magnot having its poles spaced apart'from said core poles, magnetic conduotingflaps simultaneously bridging all the gaps poles, and means for actuating said flaps, including a cam and rollers on said flaps, so that the magnet flux is successively. reversed in direction through said core between said 5. An ignition dynamo comprising a base, 7

a magnet sup orted thereby, astationary generating winding, an end plate secured to said base, ma etic conducting members simultaneously ridging all the gaps between said magnet and core and means supported wholly by said end plate for actuating said conductingmembers so that'the magnet flux is caused to shift rapidly throu h said core and winding.

6. n ignition dynamo comprising a base, a magnet sup 'orted thereby, a stationary core supporte on. said base and carryin a generating winding, an end'plate secured to said base, conductm .flaps simultaneously bridging'all the gaps etween said ma at and core, spring means acting on said aps' whereby they are normally held in contact w th said poles, and means sup orted by said end plate for actuating said iii; root the magnetic flux successively in reverse direction through said core and winding.

psto ch- 7. 'An ignition dynamo comprising} stationary core having a generating winding revprset e flux through said core and win thereon and poles attac ed thereto, a. m 4 in net having poles spaced apart from 'sal n testimony whereof I hereunto afiix my 5 'coi poles, ma%\et1c conducting members signature.

simultaneously ridging all the gaps between said poles, and means for moving CHARLES THOMAS MASON.

8. An ignition dynamo comprising a stasaid ma etie members so as to successive}? 

